Where to tap for A/F gauge?

[TheRedBox]

uhmm yeah.. i dont know where the wire is. Please advise. Thanks!

[kdanie]

Are you trying to install an aftermarket Air/fuel meter? If so, it is an O2 sensor so you will need to istall another O2 sensor bung, before the cat.
ken

[SoCalbBox]

Don't waste your time on a narrow band sensor. If you are trying to tune, forget it. If you want pretty lights go for it.

AEM does offer a wide band sensor (bosch) and UEGO controller with a display. It reads green, yellow, red AND digital in the middle. The display has a sensor for autodimming as well. I believe you can show voltage as well if you don't want 11-17.

[sithscripter]

There are two O2 sensors, an upstream one and a downstream one, so I don't think you'll need to install another one.

Unfortunately the factory wiring diagram is a bit ambiguous.

[scionxb04]

install the a/f gauge pickup on the o2 before the cat...its is a 4wire heated o2 sensor the last time i got under ther eand looked....so u need to find the 4wires comming out and find the right one to tap to.....kragen or autozone or maybe one of the local toyota techs here could give us a wire diagram of the 02 sensor? then it would be easy

daniel, I can install another O2 sensor bung for another O2 sensor. In fact I have a whole other OEM system for sale if you want it. :D

[DenZinz]

Are you force inducting your car?

Just curious on why you are looking to wire up a a/f meter.

[MiniHummer]

I have one in my car, an autometer a/f gauge. I tapped into the first o2 censor of the header. They are four wires but three of them are the same color I beleve grey you will just need to try them out and see which one works.

[sithscripter]

I'd like one just for the "Knight Rider" effect. Of course I'd wire a power switch so I could kill it when I got sick of it (like in about two weeks).

looks like the red box is up to something in the garage!! Whats up daniel!!?? Got something up your sleeve? Where are you gonna put the gauge? :D

[TheRedBox]

I'm not telling.

super secret mods!! Can't wait to see.

[sithscripter]

*** EDIT *** Whoops, I looked at the wiring info for the *DOWNSTREAM* O2 sensor by mistake. Please ignore whatever I posted earlier ...